Folded box



Jan. 10, 1939. P. FLACH 2,143,308

FOLDED BOX Jan. 10, 1939. P, FLACH 2,143,308

FOLDED BOX Filed March 28, 1935 5 Sheets-Sheet 2 Jan. 10, 1939. FLACH2,143,308

FOLDED BOX.

Filed March 28, 1935 5 Sheets-Sheet 3 Jan. l0, 1939. pI FLACH 2,143,308

FOLDED BOX Filed March 28, 1935 5 Sheets-Shea*l 4 Pwr Jan. 10, 1939. p,FLACH 2,143,308

FOLDED BOX Filed March 28. 1935 5 Sheets-Sheet 5 Jn v6 n a r:

mensaje@ 1o, 1939 l y l 2,143,308

UNITED STATES PATENT OFFICE 2443,90? FOLDED BOX Paul Flach, Dhemnltl,Germany application mmh sa, 193s. serial No. 13,54:

` In Germany March 29, 1934 21 oisans. (ol. zza-s4) 1 This inventionrelates to folded boxes, -and on to the part I in the manner shown onthe more particularly to those in which the cover right-hand side of thedrawing, these recesses and bottom part are each made-from a separatetake on the shape of a quarter of a circle, and cut-out or blank in sucha manner that the side in the box when folded together serve forreceivwalls of which two opposite ones are provided at ing the lockingtongues 8 which are provided on the ends with extensions for folding in,can be the narrow sides of the end wall tabs 9, 9 atconneoted togetherby means of tabs provided on tached to the parts 2, 2 by folding lines9a or 9b the other opposite side walls or end walls. The in such amanner that their free straight edges. invention relates to theparticular method of lie in the extension of the folding lines Illa, lub

l locking the tabs with the side walls of the box connecting the tabs 9with the adjoining strips l0 member which do not belong thereto. Thislocklll. The form of the tongues B corresponds to ing is effected bylocking tongues provided on the that of the recees 'L tabs beingintroduced into corresponding cuts or The blank is folded together inthe following recesses in the side walls. Apart from the semanner. Firstthe flaps 6 are folded down on to l curity which this locking offers the-loosthe paris'l, as shown in the right-hand part of l5 ening.r of thebox member on account of the par-l the drawing, and stuck down. Then theparts 4 ticular method of making the recesses for the are folded downonto the side walls 3 and stuck 'locking tongues, the further advantage iscbth'ereto (Fig. 2a). The side walls 3 are then tained of anextraordinary strengthening of the raised, and care is taken that theirextensions 5 2o corners of the box member and a high stability turninwards, which requires these extensions to 2o thereof. be turned atright-angles. 'Then the end walls In the drawings a nlmiber ofconstructional 2, 2 are raised and their tabs 9 are folded inexamples ofthe invention are illustrated by way wards over the extensions 5, 5 sothat the strips of example in the form of blanks for making the I0, i0come to lie on the middle part I and are boxes according to theinvention, laid out flat. folded at right-angles. As soon as the linesIlla 25 Fig. l shows a folding box blank according to and, ib havereached the lines 2a, 2b the locking the invention partly laid out dat.Hg. 2shows a tongues 8 come opposite to the" recesses l and modied formin a. similar manner. Fig. 2a spring into these recesses on account ofthe shows this construction `with the box partly elasticity of the cardmaterial, whereby locking 3o folded together. Fig. 3 shows a thirdmodificais eifected. Automatic releasing of the locking is 30 tion,partly laid out fiat, and Fig. 4Ashows in a impossible owing to theresilience of the material similar manner a fourth modification, only apart which holds the tongues 8 in the recesses 1. of the blank beingshown. Fig. 4a shows in per- At the four corners of the box membertherespective vthe blank according to Fig. 4 partly are three layers of cardsuperposed. This gives a folded into a boxt l -considerablereinforcement for the corners, which 35 In all constructions] forms theblank has a are especially sensitive to being pushed in and middle ormain part I, which-forms, for example, other stresses; moreover, onaccount of the the bottom of the box member. Adjoining the doubled layerof material adjoining the recess 1, middle or main'part and connectedtheretgalong the locking tongu 8 are caused to hold securely 40folding-lines 2a, 2b and 3a, 3b respectively are in the recesses 1. Theconnection of the flaps 6 40 the end parts or walls'2, 2 andthe sid'eparts or with the parts I, and of these parts with the parts walls 3, 3,which later will form the sides of the 3. can 0i' COIII'SB, be electedOtherwise than by box member. At the long edges of the parts 3, 3 meansof an adhesive, for example by stapling are attached side wan tabs 4. aof somewhat. les or stitching. In the same manner as described breadth,and at the narrow sides the terminal exf both the bottom Vpart and coverpart can be made 45 tensions 5, 5 are attached.. At the narrow sides forboxes with lids. The new arrangement, howof the parts 4 there arehinged'aps 6, which are ever. can naturally be used for folded boxes ofshown on the left-hand side of the drawings fiat, other kinds, All thisapplies also to the forms but on the right-hand side folded over on tothe shown in Figs. 2-4. 5o Dart-s4.Fbrfurtherincreasingthesecurityofthelock-m symmetrically to the linesGa-and 6b connecting. in the form illustrated in Fig. 2, the recesseslng the naps 6 wit-h the part 4, in the construcfor receiving thelocking tongues are cut away tional form according to lug. 1,semicircular reunderneath, in s `ch a ma'nner that the recess in cesses1 open 'on the outside are provided in the the flap lwhich comes to lieon the inside when Y u parts l and l. when the ps 6 folded over Y thebox'is folded together, overlaps the edge of the recess of the tongue,which produces a doubled depth of the rest, forming a kind of fold sothat the locking tonguescan enter behind the overlapping edges in thelocking position.

As shown in Fig. 2 the construction of the blank is fundamentally thesame as in the previously described construction; it differs essentiallyonly in that the recesses 1 do not lie exactly symmetrical with respectto the lines 6b as the part la in the flap 6 is somewhat greater thanthe part 1b in the tab 4, so that when the flap B is folded over thepart 4, as shown on the right-hand side on the drawing, the edges of therecesses 1a, as shown on the left-hand side above by the broken line,are set back behind the edges of the recesses 1b, and when the part l isfoldedinwardly over the part 3, the edges of the recesses 1b, with theedges of the recesses 1a, will form under-cut folds in which the lockingtongues 8 can slide when the box is folded together. 'Ihe lockingtongues can then not readily come out of their places, as they are heldby the projecting edges of the recesses 1b. The size of the lockingtongues 8 corresponds preferably with that of the recesses 1a.

In the constructional form according to Fig. 3 the construction of theblank as regards the parts I-Ill is substantially the same asin Fig. 2.There are, however, further or secondary flaps II hinged on to theprimary flaps 6 at I la, which are provided with recesses I2 in the formof a quarter circle. The recesses I2 and la lie symmetrically withrespect to the folding lines IIa.

The blank is prepared as follows. First of all the flaps II togetherwith the flaps B are folded about the line 6b over on the parts 4. Theflaps II are then folded in a reverse direction about the line IIa,leaving a part of flap Il projecting parallel to terminal extensions 5and beyond the part l. This procedure may of course be reversed by rstfolding part II backward on line IIa and then folding flaps 6 and IIalong the line Bb. The result in both cases is shown on the right-handside of Fig. 3. In this position the parts are gummed or otherwisefastened together. I'he blank is then ready for dispatch. The foldingtogether to form the box is effected as in the previous cases by theside parts 3 rst being raised with the superposed extensions 5 and IIturned inwards at rightangles after which the end walls 2 are raised andthe tabs 9 are folded inwards so that the locking tongues il engage inthe places formed by the recesses 1a, 1b and I2 and the strips I0 thenlle on the bottom of the box.'

By the construction of the blank according to Fig. 3 the security ofthelocking of the locking tongues is further increased because the edges ofthe place for the locking tongues consists of three layers of material;in addition, since the side walls of the box near to the corners havefour layers of material a further reinforcement is obtained of thecorners of the box, which are specially sensitive to mechanical strain.

The construction according to Fig. 4 in which, for the sake ofsimplicity, only' a part of the blank is shown, differs from thosedescribed above essentially in that the recesses I2 in the flaps II liesymmetrically with the recesses 1b of the parts 4 with respect to thefolding lines IIa between the flaps II and 6 in such a manner that whenthe flaps II are folded over the flaps G and over the parts I, therecesses I2 and 1b coincide. In this case also the recesses 1b are madesomewhat smaller than the recesses I2, in Order t0 form under-cut edges.Furthermore, another folding line I2b is provided in the extension ofthe edge I2a of the recess I2, which, when the ap il is folded overabout the line IIa, as illustrated on the right-hand side of Fig. 4,coincides with the line 6b between the flap Ii and the part 4. The innerparts of ap II will then coincide with flaps 6. These coinciding partswill thus extend beyond parts 4, and parallel to terminal extensions 5as shown on the righthand of Fig. 4. These coinciding parts may then beturned inwards together with extensions 5 when the side walls 3 areraised. The aps II are again gummed or otherwise secured to the parts Iwhich are also secured to the parts.3. The folding of the box from theblank thus formed is effected in the manner described above. In this waythere is obtained near to the corners of the box a three-fold thicknessof material for the longitudinal walls, a five-fold thickness for thenarrow side or end walls and a corresponding reinforcement of thecorners of the box. The edges of the places for the locking tongues 8also have two layers of material.

As a particular advantage for all the constructions described it may bementioned that the new construction of the locking parts, on account ofthe great security of the locking obtained thereby, makes possible avery rapid and convenient working in folding together the blanks, whichis of great importance as re gards manufacturing costs, since it ismainly a question of hand work.

Where in the above description, as well as in the claims, a folding boxis mentioned this must be taken to include not only a complete foldingbox consisting of a lower part and a cover part, but also the lower partor the cover part alone. The construction is claimed also not only forthe completely folded box or box members, but also for the blank,whether completely spread out or in a set, in which. as shown in theright-hand side of the drawings, individual parts of the blank aresecured by adhesive or stapling.

I claim:

l. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls and a flap on each end of each of said side walltabs, said flaps bent down on to their respective side wall tabs andattached thereto.

2. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls. a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs. a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted when the flaps are folded down to coincidesubstantially with the side wall tab recess, 'and a locking tongue oneach end of each of said end wall tabs adapted when the box is foldedtogether to engage one of said side wall tab recesses.

3. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of, said end walls having an end wall tab.an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a iiap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps adjacent to one of the side wall tab recesses andadapted subauasoa stantially to coincide with the side wall tab recesswhen the flap is folded down and a locking tongue on each end of each ofsaid end wall tabs adapted when the box is folded together to engageoneof said side wall tab recesses.

4. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each oi said end walls having an end wall tab,an extension on each end of each of said side walls. a side wall tab oneach of said side walls, a flap on each end of eachV of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted substantially to coincide with the side walltab recess when the flaps are folded down. said flap recesses being oflarger size than their respective side wall tab recesses, and a lockingtongue on each end of each of said end wall tabs adapted when the box isfolded together to engage one of said side wall tab recesses.

5. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls. a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, a recess at each end of said side wall tabs, a recess in each -ofsaid flaps being of larger size than its respective side wall tab recessand adapted substantially to coincide with the side wall tab recess whenthe flapsare folded down, and a locking tongue on each end of each ofsaid end wall tabs adapted when the box is folded together to engage oneof said side wall tab recesses.

6. A folding box blank comprising a main part, two opposite side walls,two opposite ends walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said slde walls, a flap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps of larger size than the respective side wall tabrecess and adapted substantially to coincide with the side wall tabrecess when the respective iiaps are folded down, and a locking tongueon each end of each of said end wall tabs adapted when the box is foldedtogether to engage one of said side wall recesses, each of said apsbeing folded down on to its respective side wall tab and securedthereto.

7. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps. being of larger size than its respective side walltab recess and adapted substantially to coincide with the respectiveside wall tab recess when the respective flaps are folded down, and alocking tongue on each end of each of said end wall tabs adapted whenthe box is folded together to engage one of said side wall tab recesses,each of said flaps being folded down on to its respective side wall taband secured thereto, and each of lsaid side wall tabs being folded downon to its respective side wall and secured thereto.

8. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on `each end of each of said sidewalls,asidewalltaboneachofsaidside walls, a flap on each end of each ofsaid side wall tabs, a recess at each end of each of said side walltabs, a recess in each of said flaps, being of larger sizethan itsrespective side wall tab recess and adapted substantially to coincidewith the respective side wall tab recess when the respective flaps arefolded down, and a locking tongue on each end of each of said end walltabs adapted when the box ls folded together to engage one of said sidewall tab recesses. each of said aps being folded down on to itsrespective side wall tab and secured thereto by sticking, and each ofsaid side wall tabs being folded down on to its respective side wall andsecured thereto by sticking.

9. A folding box comprising a main part, two opposite side walls, twoopposite end walls, each of said end Vwalls having an end wall tab, anextension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, saidflaps bent down on to'their respective side wall tabs, andlocking means to maintain said side walls and said end walls in anupwardly bent and assembled relation after the side wall tabs have beenfolded down to their respective side walls and the extensions have beenturned inwards at right-angles.

l0. A folded box comprising a main part, two opposite side walls, twoopposite end walls, each of said end walls having an end wall tab, anextension on each end of each of said side walls, a side wall tab oneach of said side walls, a ilap on each end of each of said side walltabs. a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted substantially to coincide with the respectiveside wall tab recess when the respective flaps are folded down, andalocking tongue on each end of each of said end wall tabs, each of saidlocking tongues adapted when the box is folded together to engage one ofsaid side wall tab recesses.

1l. A folding box comprising a main part, two opposite side walls, twoopposite end walls, each of said end walls having an end wall tab, anextension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted substantially to coincide with the respectiveside wall tab recess when the respective flaps are folded down, and alocking tongue on each end of each of said end wall tabs, each of saidlocking tongues adapted when the box ls folded together to engage one ofsaid side wall tab recesses and one of said'ap recesses.

12. A folding box comprising a main part, two opposite side walls, twoopposite end walls, each of said end walls having an end wall tab. anextension on each end of each of said side walls. a side wall tab oneach of said side walls, a iiap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted substantially to coincide with the respectiveside wall tab recess when the respective flaps are folded down, saidflap recesses being of larger size than said side wall tab recesses, anda locking tongue on each end of each of said end wall tabs, each of saidlocking tongues adapted when the box is folded togetherto engage one ofsaid recesses.

13. A folding box comprising a main part, two opposite side walls, twoopposite end walls, each of said end walls having an end wall tab, anextension on each end of each of said side walls. a side wall tab oneach of said side walls. a flap on each end of each of said side walltabs, a recess at each end of each of said side wall tabs, a recess ineach of said flaps adapted substantially to coincide with the respectiveside wall tab recess when the respective flaps are folded down, said naprecesses being of larger size than said wall tab recesses, and a lockingtongue on each end of each of said end`wall tabs adapted when the box isfolded together to engage one of said side wall tab recesses, each ofsaid flaps being folded down on to its respective side wall tab andsecured thereto by sticking, and each of said side wall tabs beingfolded down on to its respective side wall and secured thereto bysticking.

14. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, said flaps being bent down on to their respective side wall tabs,and a secondary nap hinged to each of said flaps.

15. A folding box comprising a main part, two opposite side walls, twoopposite end walls. each of said end walls having an end wall tab, anextension on each end of each of said side walls, a side wall tab oneach of said side walls. a flap on each end of each ofsaid side walltabs. a secondaryfiiap hinged to each of said first-named flaps andbeing bent down on to it for reinforcement, and locking elements adaptedto maintain said side walls and said end wallsin an upwardly bent andassembled relation after the side wall tabs have been folded down on tothe side walls and secured thereto by sticking.

16. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, saidV aps being bent down on to their respective side wall tabs, asecondary flap hinged to each of said flaps, a recess in each end ofsaid side wall tabs, a further recess in each of said secondary flaps,said further recesses adapted to coincide with the correspondingrecesses of said side wall tabs on said secondary flaps being foldeddown to said naps, and a locking tongue on each end of each of said endwall tabs.

17. A folding box blank comprisingv a main part, two opposite sidewalls, two opposite end walls, each of said end walls having an end walltab, an extension on each end of each of said side walls, a side walltab on each of said side walls, a flap on each end of each of saidsidewall tabs, a secondary flap hinged to each of said flaps in a scoreline, a recess on each end of each of said side wall tabs, a furtherrecess in each of said secondary aps, said recesses and said furtherrecesses being disposed substantially symmetrically to the score linesconnecting said iaps'and said secondary flaps, and a locking tongue oneach end of each of said end wall tabs adapted when the box is foldedtogether to engage 'one of said recesses.

18. A folding box blank comprising a main part. two opposite side walls,two opposite end walls, each ofvsaid end walls havinilr an end wall tab,an extension on each end of each of said auasos side walls. a side walltab on each of said side walls, a flap on each end of each of said sidewall tabs. said flaps bent down on to their respective side wall tabs, asecondary flap hinged to each of said aps in a score line, a recess oneach end of each of said side wall tabs, a further recess in each ofsaid secondary flaps, said re cesses and said further recess beingdisposed substantially symmetrically to the score lines connecting saidflaps and said secondary flaps, and a locking tongue on each end of eachof said end wall tabs adapted when the box is folded together to engageone of said ilrst mentioned recesses, each of said secondary flaps beingfolded down on to its adjacent nap so that each of said side wall tabrecesses will substantially coincide with its corresponding furtherrecess, `said side wall tabs together with their secondary flaps beingstuck on to their adjacent side walls.

19. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of l each of said side walls, a side wall tabon each of said side wallsl a flap on each end of each of said side walltabs, said flaps bent down on to their respective side wall tabs, asecondary nap hinged to each of said flaps in a score line, a recess oneach end of each of said side wall tabs, a further recess in each ofsaid flaps, a tertiary recess in each of said secondary flaps, each ofsaid further recesses and each of said tertiary recesses being disposedsubstantially symmetrically to the score lines connecting the respectiveflap to its adjacent secondary flap, and a tongue on each end of each ofsaid end wall tabs adapted to engage one of said recesses on the blankbeing folded together to set up the folding box.

20. A folding box blank comprising a main part, two opposite side walls,two opposite end walls, each of said end'walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a ap on each end of each of said side walltabs, said flaps bent down on to their respective side wall tabs, asecondary flap hinged to each of said aps in a score line, a recess oneach end of each of said side wall tabs, a further recess in each ofsaid naps, a tertiary recess in each of said secondary iiaps, each ofsaid further recesses and each of said tertiary recesses being of largersize than said side wall tab recesses and being disposed substantiallysymmetrically to the score line connecting the respective nap to itsadjacent secondary iiap, and a tongue on each end of each of said endwall tabs adapted to engage one of said recesses on the blank beingfolded together to set up the folding box.

2l. A folding box blank comprising a main part. two opposite side walls,two opposite end walls, each of said end walls having an end wall tab,an extension on each end of each of said side walls, a side wall tab oneach of said side walls, a flap on each end of each of said side walltabs, and a secondary flap hinged to each of said flaps, said secondaryflaps being folded down on to said flaps about the score linesconnecting them to their respective flaps, said naps together with theirsecondary aps being folded down on to their adjacent side wall tabs, andsaid side wall tabs being together with their respective naps andsecondary naps folded down on to the adjacent side walls and stuckthereto.

. PAUL FLACH.

